Heyday Films is a British film production company founded in 1997 by producer David Heyman in London.
Its first feature film production was Ravenous, directed by Antonia Bird. It is most notable for producing the Harry Potter film series, based on the novels by J. K. Rowling, beginning with Harry Potter and the Philosopher's Stone in 2001.
Its logo was first introduced with Harry Potter and the Goblet of Fire in 2005. However, it subsequently changed its logo, with the new version first appearing in the The Boy in the Striped Pyjamas in 2008.